From 0fd84cfeabaf572f5f901fa7d13298286d84992b Mon Sep 17 00:00:00 2001
From: Ariadne Conill <ariadne@dereferenced.org>
Date: Fri, 21 Aug 2020 06:49:40 +0000
Subject: [PATCH] Disable ssp on -nostdlib, -nodefaultlibs and -ffreestanding
Change the buffer size.
---
gcc/gcc.c | 8 +++++++-
gcc/params.opt | 2 +-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/gcc/gcc.c b/gcc/gcc.c
index be1508e5abe..e495b222095 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -989,6 +989,12 @@ proper position among the other output files. */
#define LINK_GCC_C_SEQUENCE_SPEC "%G %{!nolibc:%L %G}"
#endif
+#ifdef ENABLE_DEFAULT_SSP
+#define NO_SSP_SPEC "%{nostdlib|nodefaultlibs|ffreestanding:-fno-stack-protector} "
+#else
+#define NO_SSP_SPEC ""
+#endif
+
#ifndef LINK_SSP_SPEC
#ifdef TARGET_LIBC_PROVIDES_SSP
#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
@@ -1288,7 +1294,7 @@ static const char *cc1_options =
%{-version:--version}\
%{-help=*:--help=%*}\
%{!fsyntax-only:%{S:%W{o*}%{!o*:-o %w%b.s}}}\
- %{fsyntax-only:-o %j} %{-param*}\
+ %{fsyntax-only:-o %j} %{-param*} " NO_SSP_SPEC "\
%{coverage:-fprofile-arcs -ftest-coverage}\
%{fprofile-arcs|fprofile-generate*|coverage:\
%{!fprofile-update=single:\
diff --git a/gcc/params.opt b/gcc/params.opt
index 8ba281b4cfa..bab39cdf8a2 100644
--- a/gcc/params.opt
+++ b/gcc/params.opt
@@ -946,7 +946,7 @@ Common Joined UInteger Var(param_ssa_name_def_chain_limit) Init(512) Param Optim
The maximum number of SSA_NAME assignments to follow in determining a value.
-param=ssp-buffer-size=
-Common Joined UInteger Var(param_ssp_buffer_size) Init(8) IntegerRange(1, 65536) Param Optimization
+Common Joined UInteger Var(param_ssp_buffer_size) Init(4) IntegerRange(1, 65536) Param Optimization
The lower bound for a buffer to be considered for stack smashing protection.
-param=stack-clash-protection-guard-size=
--
2.34.0